WO2009030255A1 - Système d'avertissement d'approche permettant de détecter une personne en approche d'un objet, en particulier d'une machine - Google Patents

Système d'avertissement d'approche permettant de détecter une personne en approche d'un objet, en particulier d'une machine Download PDF

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Publication number
WO2009030255A1
WO2009030255A1 PCT/EP2007/007704 EP2007007704W WO2009030255A1 WO 2009030255 A1 WO2009030255 A1 WO 2009030255A1 EP 2007007704 W EP2007007704 W EP 2007007704W WO 2009030255 A1 WO2009030255 A1 WO 2009030255A1
Authority
WO
WIPO (PCT)
Prior art keywords
near field
field
electrode
warning system
proximity warning
Prior art date
Application number
PCT/EP2007/007704
Other languages
German (de)
English (en)
Inventor
Alfred Böhm
Wilhelm Binder
Valeri Keller
Original Assignee
Bartec Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bartec Gmbh filed Critical Bartec Gmbh
Priority to DE502007003884T priority Critical patent/DE502007003884D1/de
Priority to EP07802116A priority patent/EP2080180B1/fr
Priority to PCT/EP2007/007704 priority patent/WO2009030255A1/fr
Priority to US12/448,430 priority patent/US8102269B2/en
Priority to AT07802116T priority patent/ATE468578T1/de
Publication of WO2009030255A1 publication Critical patent/WO2009030255A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/16—Anti-collision systems
    • G08G1/166—Anti-collision systems for active traffic, e.g. moving vehicles, pedestrians, bikes

Definitions

  • the invention relates to an approach warning system for detecting an approach of a person to an object, in particular to a machine, for example an agricultural machine, wherein the object has at least partially a metallic outer structure.
  • WO 00/15931 discloses an electronic communication system for a vehicle having a base station arranged in the vehicle and a movable data carrier, the base station and the data carrier each having electrodes which form coupling paths for transmitting data signals. It can be provided that a coupling path is at least partially formed by the displacement currents leading body of a user.
  • the system known from WO 00/15931 can serve, for example, for exercising access control to the vehicle, that is to say for automatic locking or unlocking of the vehicle doors.
  • an electrode may be provided in the region of the door handle, with data being exchanged between the data carrier arranged on the person and the base station arranged on the vehicle for automatic unlocking of the door in the event the person holds his hand against the door handle.
  • An approach warning system is not provided in WO 00/15931.
  • Another access authorization system is known from WO 2005/088859. This known system can also serve to generate a loss alarm in case of loss of an object or a person. An approach warning system is not described.
  • WO 96/36134 discloses a system for contactless detection and signal transmission using the human body as a signal transmission medium.
  • the system can also be used as a position sensor, with in In this case, a plurality of receivers is arranged like a matrix. Due to the large number of receivers required, this system is also comparatively expensive.
  • EP 0 843 425 A2 discloses an electronic communication device which employs the human body as a transmission medium. An approach warning system is also not described herein. An information transmission system using a near electric field is known from WO 2004/036784 A1.
  • an approach warning system for detecting an approach of a person to an object, which at least partially has a metallic outer structure.
  • the proximity warning system is formed with at least a first near field device associated with the object and a second near field device associated with the person, wherein the first and second near field devices form a transmission path for a near electric field, and a warning device when entering the person with the second Nahfeld coupled in a detection area in which a transmission of the near field over the transmission path, outputs an approach warning signal, wherein the first Nahfeld worn for coupling to the near field on the one hand with at least one stray field electrode and the other with the metallic outer structure of the object is connected, so that the outer structure forms a counter electrode to the stray field electrode, and wherein the Nahfeld disturbeden and their electrodes are configured so that the detection area, the entire metallic outer structure of the object at least almost envelops and / or surrounds.
  • a first basic idea of the invention may be seen in realizing an approach warning system based on a near-field electric field.
  • two near field devices are used, one of which is for and the other serves to detect the near field, and one of which is placed on the machine and the other on the person.
  • one of the two near field devices is a near field generator and the other near field device is a near field detector.
  • the near field between the generator and the detector is transmitted.
  • Successful transmission, and in particular the achievement of a predetermined near-field signal strength is considered to be an entry into the danger zone and accordingly, in particular on the object, a warning signal is output.
  • a further aspect of the invention resides in configuring the near-field devices, in particular the first near-field device associated with the object, and / or their electrodes in such a way that the detection region envelops the entire metallic outer structure of the object.
  • a detection area is thus positioned not only in the area of the door handles but also in the area of the entire metallic outer structure, that is, for example, of the entire body. This allows, with a particularly small number of near field devices, the entire detection area, i. especially danger zone.
  • a further aspect of the invention is to use a stray field electrode for coupling the first near field device arranged on the object to the electric near field and the metallic outer structure of the object which forms a counter electrode to the stray field electrode. Accordingly, the first near field device is conductively connected to the stray field electrode and the metallic outer structure.
  • the approach warning system according to the invention for agricultural machinery, where it can be used in particular to detect children who are in the danger environment of the machine, and if necessary to trigger a corresponding alarm and / or automatically take countermeasures to avert the danger.
  • the device is also suitable for cars, trucks, with or without trailers, construction machines, such as cranes, forklifts, etc. It can also be installed on machines, in particular on stationary machines with moving elements. For example, the system can also monitor a fenced area. According to the invention, a quasi-stationary electric near field is advantageously used.
  • the near-field In contrast to a far-field that decays at 1 / r, such a near-field suitably decays with 1 / r 2 or higher powers, so that the near-field range is usually less than the far-field range.
  • An electric near field according to the invention has the advantage that energy losses are low compared with a far field, since a near field does not detach. As a result, a particularly efficient system can be obtained.
  • the near field is an E-field, which is capacitively coupled and decoupled.
  • the near field devices are preferably designed without antennas.
  • the coupling elements of the near field devices suitably have dimensions which are preferably at least an order of magnitude smaller than the wavelength of the near field.
  • conductor lengths ⁇ / 10 or ⁇ / (2 ⁇ ) can be provided on the coupling elements.
  • the entire metallically conductive structure is subjected to a quasistatic electric field which lays around this metal structure like an "aura.” If a person with a corresponding near-field detector arrives in the area of this "aura", the " Aura "detected by the detector and issued a corresponding warning signal.
  • the near field device assigned to the object is a near field detector and the near field device associated with the object is a near field generator.
  • the first near field device assigned to the object is the near field generator for generating the near field
  • the second near field device assigned to the person is the near field detector for receiving the near field.
  • the signal field strengths occurring at the person are reduced and for the operation of the generally comparatively high-performance field strengths.
  • generator an on-board power source of the object, for example a vehicle battery, can be used.
  • the near field generator is assigned to the object in a preferred manner, it is suitably configured with its electrodes in such a way that the generated near field at least approximately envelops the metallic outer structure of the object. In this case, a single transmitting device is sufficient to protect the entire object.
  • the object is a vehicle, in particular a land vehicle, for example a tractor, a forklift, a car or a truck.
  • the vehicle may be an agricultural utility vehicle.
  • the metallic outer structure is suitably a body and / or a chassis of the vehicle.
  • the Nahfeld Rhein and their electrodes are thus preferably configured so that the detection area and in particular the near field, the entire body of the object, preferably with chassis, surrounds and at least approximately envelops.
  • the stray field electrode is expediently provided outside the metallic outer structure.
  • the stray field electrode is arranged above the roof of the body.
  • a further preferred embodiment of the invention consists in that the stray field electrode is arranged in a bumper, in particular in a plastic bumper, of the body. This makes it possible to arrange the stray field electrode in a particularly simple manner and without changing the air resistance of the vehicle in a protected area.
  • the first near field device may also be connected to a plurality of stray field electrodes, one of which may be arranged, for example, in a front bumper and the other in a rear bumper of the body.
  • stray field electrodes different locations with respect to the metallic outer structure can be provided. This allows a distinction of the direction of the person at risk. If several first Nahfeld coupleden are provided, remains an essential aspect of the invention that the detection area formed by them envelops the entire metallic outer structure of the object at least, in particular together produce a near field, which at least approximately envelops the entire metallic outer structure of the object.
  • the stray field electrode can basically be designed differently. However, ball electrodes have proved to be particularly efficient. Alternatively it can be provided that the stray field electrode is elongate and perpendicular to adjacent portions of the metallic outer structure. Even perpendicularly arranged electrodes produce a good stray field.
  • the metallic outer structure can be earthed.
  • the near-field-based proximity warning system is functional even when grounded, which is probably due to the impedance of the ground.
  • a near field can also be formed when the vehicle is grounded underneath the vehicle.
  • the metallic outer structure can also be designed in several parts.
  • it may consist of the chassis and / or body of a tractor on the one hand and a trailer or tool attached thereto, for example a loading wagon, plow or liquid manure tank, on the other hand.
  • the outer structure is formed in several parts, is between the individual parts suitably given an electrical, such as metallic coupling, in particular by a detachable electrical connection.
  • an electrical connection By means of such an electrical connection, the near field and / or the detection area can extend to all parts of the outer structure without the need for additional active devices.
  • the field surrounding the tractor may extend to a trailer.
  • the releasable electrical connection can simultaneously form a mechanical connection between the parts and be formed for example by the trailer hitch of the tractor. Additionally or alternatively, an electrical plug connection can also be provided. Furthermore, it is particularly advantageous that the electric near field is an alternating field. Such an alternating field allows the near field devices to distinguish the field generated by the near field generator from other fields in a particularly simple manner.
  • An oscillation frequency of the alternating field is preferably in the range of 10 kHz to 10 MHz, in particular from 1 MHz to 5 MHz, with 5 MHz being preferred.
  • the detectors can be constructed in a particularly simple manner at the frequencies mentioned.
  • a particularly simple and reliable proximity warning system can be obtained according to the invention in that the alternating field is a continuous (CW) alternating field.
  • CW continuous
  • the alternating field can thus be unmodulated and / or carry no information technology information content.
  • a continuous alternating field allows a particularly high level of operational safety. According to the invention, it may therefore be particularly advantageous that no data is transmitted via the near field, that is, the near field is data-free following the switch-on process, and the near field serves merely to detect an approach and / or to determine the distance.
  • the near field according to the invention is not used in particular for transmitting information but merely for determining the distance between the two near field devices on the basis of the field strength of the near field.
  • it may also be provided to impose information on the near field, so that the detector can distinguish, for example, different field generators.
  • the reliability of the system can be increased by providing the near-field detector with means for discriminating the near-field generated by the near field generator from other fields. As a result, false alarms can be avoided by any additional existing fields.
  • the means for distinguishing may for example have a frequency filter which is tuned to the field frequency of the alternating field.
  • a bandpass filter can be provided, which For example, may be formed as an electrical band-pass filter and optionally may also have a mixer for generating an intermediate frequency.
  • a decision circuit which decides on an approach of the person to the object on the basis of a signal strength of the near field present at the near field detector.
  • This decision circuit is preferably connected downstream of the means for distinguishing and / or may be part of the warning device. It decides on the basis of the strength of the received near-field signal whether there is an approximation and thus a potential hazard situation.
  • the decision circuit can, for example, have a threshold value switch which can trigger an alarm, in particular when a threshold value is exceeded.
  • the decision circuit can be designed to work continuously and be designed to determine a distance information from the signal strength.
  • the decision circuit may comprise an analog / digital converter.
  • the decision circuit is preferably arranged at least partially on the near-field detector. Additionally or alternatively, however, it may also be assigned to the near field generator.
  • a further advantageous embodiment of the invention is that the near-field detector has a radio transmitter, and that the radio transmitter is adapted to change the nature of a radio signal generated by it in dependence on a signal strength of the near field present at the near field detector.
  • This embodiment makes it possible to transmit information about an approach which is registered by the person-carried near-field detector by means of the radio signal to the object, where then, for example, a warning signal can be output.
  • the radio transmitter communicates with the decision circuit and alters the radio signal in dependence on the signal strength it has detected, which is a measure of the approach.
  • the change in the texture of the radio signal may include a modulation of the radio signal with information about the approach. It can be provided to change the radio signal when a threshold of near field signal strength is exceeded. Additionally or alternatively, information about the signal strength, which is correlated with the distance, can be modulated on the radio signal. Furthermore, it is expedient that the warning device is arranged at least in part on the object and has a radio receiver for detection and / or evaluation of the radio signal from the radio transmitter. According to this embodiment, information about the approach from the person-arranged near field detector to the object is transmitted over a radio link, so that the object can be warned of approaching.
  • the object is assigned a second radio transmitter and the person for a second radio receiver, wherein the second radio receiver preferably has means for activating the near field detector upon receipt of a radio signal from the second radio transmitter.
  • the near field detector assigned to the person is designed to be "asleep" and is activated by the radio signal of the second radio transmitter only when approaching the object, thereby reducing the energy consumption at the near field detector
  • the second radio transmitter is advantageous for the second radio transmitter to periodically transmit a signal in order to further reduce the power consumption.
  • the first radio transmitter and the first radio receiver preferably operate on a first frequency and the second radio transmitter and the second radio receiver on a second frequency, wherein the two frequencies are expediently different.
  • the first frequency may be about 433 MHz and the second frequency about 868 MHz.
  • the first frequency may be about 868 MHz and the second frequency about 433 MHz.
  • the first radio transmitter assigned to the person and the second radio receiver assigned to the person can be designed as transceivers (transceivers).
  • the first radio receiver assigned to the object and the second radio transmitter assigned to the object can form a transceiver.
  • the radio transmitters and receivers can be designed to exchange information between object and person.
  • a data transmission between object and person can take place in particular via a radio link, wherein the near field can be designed to be free of data and / or information.
  • the one or more radio transmitters and receivers are suitably designed for transmitting or receiving a far field.
  • the means for activating the near field detector preferably turn on periodically and then examine whether a radio signal is present.
  • a signal is sent back to the object by means of the first radio transmitter as soon as the second radio receiver receives a radio signal.
  • a first (pre-) warning level can be triggered, even if no near field is yet transmitted.
  • the signal of the first transmitter can be changed and then a second warning level can be triggered.
  • the means for activating may turn on, for example, with a periodicity of milliseconds to seconds.
  • the near field generator has an electric oscillation generator for generating the alternating field.
  • the frequency of this generator can be in the range of a few kHz in the range of a few MHz and is preferably between 10 kHz and 10 MHz. Particularly preferred is a range between 1 and 10 MHz, with 5 MHz have shown in experiments to be particularly useful.
  • the near field generator is suitably designed for continuous wave operation, that is to say it operates after switching on and optionally an initial adjustment with constant frequency and / or amplitude and / or does not transmit any information.
  • the capacitance between the electrode and the counter electrode of the near field generator can change when objects or persons reach the area of the electrodes and / or the dimensions of the electrodes are changed, for example when attaching a trailer to the tractor. Also capacity changes may occur when changing the ambient conditions such as humidity and / or soil moisture.
  • the oscillation frequency of the alternating field is kept constant even with such variable capacity.
  • the vibration generator it is advantageous for the vibration generator to have means for keeping its oscillation frequency constant.
  • these means for keeping constant the vibration fre- be formed with variable electrode capacitance. Due to the fixed frequency regardless of the capacitive conditions, the system is very safe, reliable and inexpensive.
  • the vibration generator is set up to generate a sinusoidal oscillation.
  • a square wave can be provided, which may be disadvantageous due to their harmonics, however.
  • the vibration generator may be galvanically isolated from an electrical system of the object, in particular the vehicle.
  • the vibration generator to have means for setting a vibration amplitude height. This allows adjustment of the range of the near field and thus an adjustment of the size of the detection area.
  • the vibration generator has means for adjusting the vibration frequency.
  • the vibration generator can be tuned to different near field detectors.
  • an alternating voltage is advantageously generated, which is applied to the stray field electrode and the counter electrode formed by the metallic structure.
  • the in- fluencing E-field in the human body causes displacement currents and a local field strength increase in the area of the human body can occur. These displacement currents can be detected along the body.
  • the second near-field device is connected to a body electrode associated with the body of the person and secondly to a second electrode spaced from the body electrode, which forms a counter electrode to the body electrode.
  • the body electrode By the close contact between the body electrode and the body of the person provided according to this embodiment, the body of the person himself can serve as a kind of antenna, amplifier and / or collecting electrode. Measurements have shown that by using a body electrode a signal increase by a factor of 20 or more can be obtained.
  • the body electrode is provided according to the invention for engagement with the human body. For the largest possible near-field signal, the body electrode should be worn as close to the body as possible.
  • the body electrode may be provided for capacitive or conductive, i.e. ohmic, contact with the human body so as to capacitively or ohmically receive the signal and / or the displacement current in the body.
  • a body electrode and thus the use of the human body as a "collecting electrode” is advantageous in other respects, so that localized defects may occur in the field distribution of the near field, possibly due to superimposing effects
  • Body of the person used as a receiving electrode a comparatively large electrode is given, which can bridge the "defects" over.
  • the influence of such defects is reduced by a relative movement between object and person.
  • the counter electrode to the body electrode is suitably spaced from and / or electrically isolated from the body electrode.
  • the counter electrode has a different geometry compared to the body electrode.
  • the body electrode is designed as a ring electrode, which is provided in particular for enclosing an arm or a leg of the body.
  • the ring electrode can also be formed interrupted. Preferably, it has a closure with which the ring can be opened for application or removal.
  • the body electrode and / or the counterelectrode of the second near field device are preferably electrically insulated from the environment in order to prevent unwanted short-circuiting. Conclusions, especially when the person is moving.
  • the stray field electrode can also be electrically insulated from the environment.
  • the invention also relates to a warning method in which an approach warning system according to the invention is provided and a warning signal is output by means of the warning device when a person enters the detection area.
  • An object of the invention is to provide a system which makes it possible to provide the person to be protected with a passive detector with which it can be detected whether the person is in an electric near field.
  • the system is thereby stimulated by a frequency so that the detector can selectively detect whether a received field is indicative of a hazard field.
  • a near field is used as the electric field, which ensures that the range of the field extends only over an area that is spatially closely connected to the hazardous object.
  • the near field forms an "aura" with alternating charge around the metallic object, depending on how the stray field electrode subjected to alternating voltage is charged instantaneously.
  • An advantage of the system according to the invention is that any metallic coupling, for example a trailer, automatically leads to the expansion of the "aura", which merely becomes weaker
  • the secondary fields also contribute to the overall field, and it should be noted that the generation of a large stray field generally has a positive effect on the field generation Chassis of the object itself to use as an electrode and not just couple into the chassis.
  • FIG. 1 shows a first embodiment of an approach warning system according to the invention
  • FIG. 2 is a detailed view of the near field detector of FIG. 1;
  • FIG. 3 shows a more detailed detail view of the near-field detector from FIGS. 1 and 2;
  • FIGS. 2 and 3 shows various possible arrangements of the near field detector of FIGS. 2 and 3 on a person
  • FIG. 5 shows an exemplary embodiment of a near-field generator for use in a system according to the invention when arranged on a passenger vehicle
  • Fig. 6 shows another embodiment of an inventive
  • FIG. 1 A first embodiment of a system according to the invention is shown in FIG.
  • the illustrated system is provided on an object 1, 2, which is formed by a tractor 1 with an attached trailer 2.
  • the object 1, 2 has a metallic outer structure 3, 8, which is formed by a metallic body with chassis of the tractor 1 and a frame 8 of the trailer 2.
  • a stray field electrode 4 is provided on the roof 16 of the tractor 1.
  • This stray field electrode 4 is electrically insulated from the body 3 and from a metallic drive part of the tractor 1.
  • the stray field electrode 4 is formed as a ball electrode. In principle, however, it can also be designed as a surface electrode, conical electrode, etc., wherein it is important that it builds up the largest possible stray field for the tractor 1 and its surroundings.
  • the stray field electrode 4 is electrically connected to a vibration generator 5 designed as a frequency generator.
  • the other pole of the vibrator 5 is electrically connected to the metallic outer structure 3 of the tractor 1.
  • the vibration generator 5 is part of a first near field device 21, which is designed as a near field generator.
  • the metallic outer structure 3 of the tractor 1 and the metallic outer structure 8 of the trailer 2 are connected to each other via a mechanical coupling 6, which also establishes an electrical connection between the outer structures 3 and 8.
  • the vibrator 5 is connected to the two outer structures 3 and 8.
  • an electrical stretching connection (not shown) may be provided between the external structures 3 and 8.
  • Corresponding power lines can for example lead to a retroreflector 7 and also form a counter electrode to the stray field electrode 4.
  • the rims 18 of the objects 1 and / or 2 can form a counter electrode to the stray field electrode 4 with the corresponding chassis.
  • a quasistatic E-field that is to say a near field 10 is formed around the entire object 1, 2, the strength and / or density of which rapidly decreases toward the outside.
  • a line 9 of constant field strength is shown in FIG.
  • the near field 10 also flows through a person 11 to be protected located in the vicinity of the object 1, 2 and influen formulate in their displacement currents, which can be detected on a trained as a detector second Nahfeld vibration 22, which is supported by the person 11.
  • the second near field device 22 is shown in detail in FIGS. 2 and 3. It has an annular body electrode 31 which can be applied to an arm or to a leg of the person 11 and is worn as close to the body as possible.
  • the body electrode 31 may be capacitively and / or ohmically coupled to the body. Accordingly, the body electrode 31 may be insulated from the outside or made conductive.
  • an insulating housing 30 is provided, in which an electronics 33 and a battery 35 for supplying the electronics 33 are arranged.
  • a planar counter electrode 37 is arranged on one of the body electrode 31 facing away from flat side of the housing 30, a planar counter electrode 37 is arranged.
  • the counter electrode 37 is made of metal and may be formed for example by a copper-clad circuit board.
  • an insulation 38 is provided on the surface of the counter electrode 37.
  • a capacitive coupling to the earth 14 can be produced via this counter electrode 37, via which the transmission circuit between the two near-field devices 21, 22 closes.
  • one of the radio antennas 39 is provided for operation at a frequency of 433 MHz and the other radio antenna 39 'for operation at a frequency of 868 MHz.
  • FIG. 4 shows different possible arrangements of the second near-field device 22 embodied as a detector on the body of the person 11.
  • the associated body electrode 31' is arranged on the leg of the wearer.
  • the body electrode 31" is arranged in the region of the abdomen of the wearer.
  • the body electrode 31'" is disposed on the arm of the wearer.
  • the body electrode 31 "" surrounds the head of the carrier in the form of a ring electrode.
  • the counter electrode 37 "" is in this case in the form of a hat brim.
  • FIG. 5 A further exemplary embodiment of the arrangement of a first near-field device 21 configured as a near-field generator is shown in FIG. 5.
  • the stray field electrode 4 of the vibrator 5 is disposed inside a bumper 17 formed of plastic.
  • the metallic outer structure 3, that is, the body, a trained as a car object 1 is used as a counter electrode.
  • FIG. 6 Another embodiment of a system according to the invention is shown in FIG. Similar to the embodiment of FIG. 1, a first near field device 21 with a vibration generator 5 is also provided in the exemplary embodiment of FIG. 6, which is connected on the one hand to a stray field electrode 4 and on the other hand to the metallic outer structure 3 of an object 1 designed as a tractor.
  • the oscillator 5 may have, for example, an operating frequency of 5 MHz and an output voltage of approximately 0.1 V to approximately 500 V (0 V ⁇ U ⁇ 500 V).
  • the first near field device 21 By means of the first near field device 21, a near field formed as an alternating field is generated, which surrounds the object 1 and defines a detection range for the approach.
  • the second near-field device 22 to be supported by a person and designed as a detector is shown in FIG. 6 on the right-hand side. In principle, this second near-field device 22 can also have an inverted generator for detection.
  • This amplifier 46 is followed by means 47 designed as a bandpass filter for distinguishing the near field generated by the oscillator 5 from other fields.
  • This is followed in turn by a threshold circuit designed as a decision circuit 48, which is followed by a transmitter 49.
  • a first radio transmitter 51 is arranged.
  • the electrodes 31 and 37 receive the alternating near field. If the body electrode 31 is carried close to the body, the measuring effect can be increased by a considerable factor, for example 90.
  • the signal of the electrodes 31, 37 is amplified in the amplifier 46 and fed to the bandpass filter 47, which is tuned to the frequency of the vibrator 5.
  • the signal of the bandpass filter 47 is supplied to the threshold value switch 48, the output signal of which is in turn directed to the evaluation electronics 49. It is also possible to apply the signal coming from the band-pass filter 47 to an A / D converter and to evaluate it for distance determination.
  • the first radio transmitter 51 changes the radiated signal.
  • the radiated signal of the first radio transmitter 51 is received by a first radio receiver 53 on the object 1. If the received signal indicates a threshold value overrun and thus an approximation, a warning device 55 provided on the object 1 and coupled to the first radio receiver 53 emits a warning signal.
  • a second radio transmitter 52 is also provided.
  • a corresponding second radio receiver 54 is arranged on the second near field device 22.
  • the second radio receiver 54 is designed so that it the facilities 46, 47, 48, 49 and / or 51 is activated only when it receives a radio signal from the second radio transmitter 52.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Alarm Devices (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Abstract

La présente invention concerne un système d'avertissement d'approche permettant de détecter une personne en approche d'un objet présentant au moins partiellement une structure extérieure métallique. Le système comprend au moins un premier dispositif à champ proche qui est associé à l'objet et un second dispositif à champ proche qui est associé à la personne, lesquels premier et second dispositif à champ proche forment une voie de transmission pour un champ électrique proche, ainsi qu'un dispositif d'avertissement qui délivre un signal d'avertissement d'approche lorsque la personne portant le second dispositif à champ proche entre dans une zone de détection dans laquelle le champ proche est transmis sur la voie de transmission. Pour le couplage avec le champ proche, le premier dispositif à champ proche est, d'un côté, relié à une électrode de champ de fuite et, d'un autre côté, à la structure extérieure métallique de l'objet, de manière que la structure extérieure constitue une contre-électrode à l'électrode de champ de fuite. Les dispositifs à champ proche et leurs électrodes sont conçus de manière que la zone de détection englobe au moins approximativement l'ensemble de la structure extérieure métallique de l'objet.
PCT/EP2007/007704 2007-09-04 2007-09-04 Système d'avertissement d'approche permettant de détecter une personne en approche d'un objet, en particulier d'une machine WO2009030255A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE502007003884T DE502007003884D1 (de) 2007-09-04 2007-09-04 Annäherungsnachweissystem zum nachweis einer annäheine maschine
EP07802116A EP2080180B1 (fr) 2007-09-04 2007-09-04 Système de verification d'approche permettant de détecter une personne en approche d'un objet, en particulier d'une machine
PCT/EP2007/007704 WO2009030255A1 (fr) 2007-09-04 2007-09-04 Système d'avertissement d'approche permettant de détecter une personne en approche d'un objet, en particulier d'une machine
US12/448,430 US8102269B2 (en) 2007-09-04 2007-09-04 Approach warning system for detecting when a person approaches an object, particularly a machine
AT07802116T ATE468578T1 (de) 2007-09-04 2007-09-04 Annäherungsnachweissystem zum nachweis einer annäherung einer person an ein objekt, insbesondere an eine maschine

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PCT/EP2007/007704 WO2009030255A1 (fr) 2007-09-04 2007-09-04 Système d'avertissement d'approche permettant de détecter une personne en approche d'un objet, en particulier d'une machine

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Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7890055B1 (en) * 2007-07-09 2011-02-15 Everlokt Corporation Touch field compound field detector personal ID
US8279077B1 (en) * 2008-11-03 2012-10-02 Avid Technologies, Inc. Radio frequency-based proximity detection system
US8558714B1 (en) 2008-11-03 2013-10-15 Avid Technologies, Inc. Radio frequency-based proximity detection system
US8648709B2 (en) * 2010-05-12 2014-02-11 Proxisafe Ltd. Event warning system and method thereof
CN102818926B (zh) * 2012-08-28 2015-11-25 王奎 一种智能电压警示仪
US9277394B2 (en) * 2012-11-29 2016-03-01 Paypal, Inc. Nomination of a primary cell phone from a pool of cell phones
DE102013208005A1 (de) * 2013-05-02 2014-11-06 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Betreiben einer kontaktlosen Ladeeinrichtung
US9660301B2 (en) 2013-10-29 2017-05-23 Xiaomi Inc. Methods and devices for battery protection
US11756427B1 (en) 2014-04-15 2023-09-12 Amanda Reed Traffic signal system for congested trafficways
US9424749B1 (en) 2014-04-15 2016-08-23 Amanda Reed Traffic signal system for congested trafficways
WO2017208363A1 (fr) * 2016-05-31 2017-12-07 日立マクセル株式会社 Terminal de communication mobile et son procédé de commande
EP3955228A1 (fr) * 2016-12-30 2022-02-16 DeLaval Holding AB Système pour assurer une sécurité améliorée dans un environnement agricole
US10984137B2 (en) 2019-02-15 2021-04-20 Charter Communications Operating, Llc Secure data at rest
US11443038B2 (en) * 2019-04-18 2022-09-13 Toyota Motor North America, Inc. Systems and methods for countering security threats in a passive keyless entry system
US11449691B2 (en) * 2020-08-20 2022-09-20 Assa Abloy Ab Relay attack detection for interfaces using command-response pair
US11958403B2 (en) * 2022-05-23 2024-04-16 Caterpillar Inc. Rooftop structure for semi-autonomous CTL

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005088859A1 (fr) * 2004-03-15 2005-09-22 Siemens Ag Österreich Transmission de donnees a courte distance, a faible debit de transmission, avec utilisation d'un champ de dispersion electrique approprie
DE102005060778A1 (de) * 2005-12-16 2007-06-21 Ident Technology Ag Detektionsschaltungseinrichtung und Verfahren zur Erfassung der Präsenz eines Objektes im Umgebungsbereich eines Kraftfahrzeuges

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996036134A1 (fr) 1995-05-08 1996-11-14 Massachusetts Institute Of Technology Dispositif de detection sans contact et de signalisation par courants intra-corporels induits par une source exterieure
US5796827A (en) 1996-11-14 1998-08-18 International Business Machines Corporation System and method for near-field human-body coupling for encrypted communication with identification cards
US5986549A (en) * 1997-07-23 1999-11-16 Teodorescu; Horia-Nicolai Position and movement reasonant sensor
WO2000015931A1 (fr) 1998-09-14 2000-03-23 Koninklijke Philips Electronics N.V. Systeme de communication electronique
JP4035418B2 (ja) * 2001-10-31 2008-01-23 株式会社本田電子技研 近接スイッチおよび物体検出装置
WO2004036784A1 (fr) 2002-10-11 2004-04-29 Siemens Aktiengesellschaft Systeme asymetrique de transmission de messages reposant sur l'utilisation d'un champ electrique proche
JP4604739B2 (ja) * 2005-01-28 2011-01-05 アイシン精機株式会社 静電容量検出装置
DE102006042547A1 (de) 2006-09-11 2008-03-27 Bartec Gmbh System zum Überwachen eines Gefahrenbereiches, insbesondere eines Fahrzeugs
US7724002B2 (en) * 2006-12-10 2010-05-25 I F M Electronic Gmbh Capacitive sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005088859A1 (fr) * 2004-03-15 2005-09-22 Siemens Ag Österreich Transmission de donnees a courte distance, a faible debit de transmission, avec utilisation d'un champ de dispersion electrique approprie
DE102005060778A1 (de) * 2005-12-16 2007-06-21 Ident Technology Ag Detektionsschaltungseinrichtung und Verfahren zur Erfassung der Präsenz eines Objektes im Umgebungsbereich eines Kraftfahrzeuges

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ATE468578T1 (de) 2010-06-15
EP2080180B1 (fr) 2010-05-19
EP2080180A1 (fr) 2009-07-22
DE502007003884D1 (de) 2010-07-01
US8102269B2 (en) 2012-01-24
US20100026509A1 (en) 2010-02-04

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